/* Declarations for getopt.
Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details. */
#ifndef_GETOPT_H
#define_GETOPT_H 1
#ifdef__cplusplusextern"C" {
#endif/* For communication from `getopt' to the caller.
When `getopt' finds an option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-option ARGV-element is returned here. */externchar *optarg;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-option elements that the caller should itself scan.
Otherwise, `optind' communicates from one call to the next
how much of ARGV has been scanned so far. */externint optind;
/* Callers store zero here to inhibit the error message `getopt' prints
for unrecognized options. */externint opterr;
/* Set to an option character which was unrecognized. */externint optopt;
/* Describe the long-named options requested by the application.
The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
of `struct option' terminated by an element containing a name which is
zero.
The field `has_arg' is:
no_argument (or 0) if the option does not take an argument,
required_argument (or 1) if the option requires an argument,
optional_argument (or 2) if the option takes an optional argument.
If the field `flag' is not NULL, it points to a variable that is set
to the value given in the field `val' when the option is found, but
left unchanged if the option is not found.
To have a long-named option do something other than set an `int' to
a compiled-in constant, such as set a value from `optarg', set the
option's `flag' field to zero and its `val' field to a nonzero
value (the equivalent single-letter option character, if there is
one). For long options that have a zero `flag' field, `getopt'
returns the contents of the `val' field. */struct option
{
#if__STDC__constchar *name;
#elsechar *name;
#endif/* has_arg can't be an enum because some compilers complain about
type mismatches in all the code that assumes it is an int. */int has_arg;
int *flag;
int val;
};
/* Names for the values of the `has_arg' field of `struct option'. */
#defineno_argument 0
#definerequired_argument 1
#defineoptional_argument 2
#if__STDC__
#ifdefined(__GNU_LIBRARY__)
/* Many other libraries have conflicting prototypes for getopt, with
differences in the consts, in stdlib.h. To avoid compilation
errors, only prototype getopt for the GNU C library. */externintgetopt (int argc, char *const *argv, constchar *shortopts);
#else/* not __GNU_LIBRARY__ */externintgetopt ();
#endif/* not __GNU_LIBRARY__ */externintgetopt_long (int argc, char *const *argv, constchar *shortopts,
conststruct option *longopts, int *longind);
externintgetopt_long_only (int argc, char *const *argv,
constchar *shortopts,
conststruct option *longopts, int *longind);
/* Internal only. Users should not call this directly. */externint_getopt_internal (int argc, char *const *argv,
constchar *shortopts,
conststruct option *longopts, int *longind,
int long_only);
#else/* not __STDC__ */externintgetopt ();
externintgetopt_long ();
externintgetopt_long_only ();
externint_getopt_internal ();
#endif/* not __STDC__ */
#ifdef__cplusplus
}
#endif
#endif/* _GETOPT_H */